Device for producing stabilized



y 3, 1952 A. B. STOREY 2,596,306

DEVICE FOR PRODUCING STAPILIZED YARNS Filed Aug. 12, 1947 INVEN TOR.

ALVIN B. STOREY ATTORNEYS.

Patented May 13, 1952 DEVICE FOR PRODUCING STAPILIZED YARNS Alvin B. Storey, Cumberland, Md., assignor to Celanese Corporation of America, a corporation of Delaware Application August 12, 1947, Serial No. 768,110

1 Claim.

This invention relates to the manufacture of textile yarns, and relates more particularly to a device for producing yarns having the appearance of spun yarn, that is, yarn made from staple fiber, but having a basis of continuous filaments.

In the manufacture of spun yarn from artificial fibers, the usual practice is to cut continuous artificial filaments or waste filaments into comparatively short lengths, for example of 1 to 2 inches or more, and then subject the staple fibers produced to a series of operations appropriate to th length of the fiber, such operations being similar to those accorded to natural fibers such as cotton or Wool, including opening, carding, drawing and spinning. These operations represent considerable expense in the production of such yarns, since they involve a relatively slow transformation of the initial fibrous material to a finished yarn.

It is an object of this invention to provide an improved device for producing yarn having an appearance similar to that of yarn made from spun fiber without the necessity for cutting continuous filaments into short lengths and spinning the fibers thus produced, which device is simple in construction, inexpensive in cost and effective in operation.

Another object of this invention is the provision of an improved device for producing uniformly abraded yarn by modifying a standard type of textile machine.

Other objects of this invention, together with certain details of construction and combinations of parts, will appear from the following detailed description and the claim.

While the instant invention will be described in connection with a ring twister, it is to be understood that the invention may be employed with any textile machine wherein yarn is run from point to point.

In accordance with this invention, the nip roll or both the nip roll and the feed roll of a ring twister may be covered with a sleeve of abrasive material such as emery or carborundum. The continuous filament yarn from a supply package or bobbin is passed under the feed roll and over the nip roll so as to sever some but not all of the filaments of the yarn, maintaining the continuity of the yarn. The now abraded or stapilized yarn is then passed to the ring twister for twisting and winding onto a suitable take-up package or bobbin.

The present invention will now be described in greater detail with reference to the figure in the accompanying drawing which shows a ring twister modified in accordance with this invention, it being understood that this ring twister is one of many usually mounted in rows on a machine and operated simultaneously.

In the drawing, a continuous filament yarn I is drawn from a supply bobbin 2 suitably supported on a holder or creel 3 and passed through pigtail guides 4 and 5. From the pigtail guide 5, which may be attached to lappet bar 6, the continuous filament yarn is passed under steel feed roll I and over nip roll 8 which is provided with a removable sleeve 9 made of or covered with an abrasive material such as emeiy or carborundum. While passing around nip roll 8 some but not all of the filaments are severed. The yarn, which at this point may be classified as a continuous staple fiber product or stapilized yarn, is then fed through balloon pigtail guide ll onto the ring twister, generally indicated by reference numeral 12, by which it is twisted and Wound onto take-up bobbin E2.

The steel feed roll may be rotated in any suitable manner as is well known in the art.

The pigtail guide 5 may be located either on or oiT center in relation to the nip and feed rolls. Moreover, this pigtail guide may, if desired be traversed at a predetermined stroke and speed by the lappet bar 8.

The degree of cutting to which the continuous filament yarn may be subject is easily controlled in accordance with the present invention by employing different grades and kinds of abrasive material or by varying the weight of the nip roll 1 which would vary the pressure on the yarn being out at the nip between nip roll 8 and feed roll I. For abrading yarn of high denier, an abrasive sleeve may also be placed over feed roll I.

The final abraded or stapilized yarn produced by my novel device is more uniform than yarn abraded or stapilized by prior devices; the yarn does not contain a high variation in diameter along the length thereof. Moreover, th abraded or stapilized yarn retains a high percentage of the tenacity and elongation of the original continuous filament yarn. For example, continuous filament yarn of 23 to 26% extension and 1.2 grams per denier tenacity is converted by my device to a stapilized yarn of 15 to 17% extension and 0.8 to 0.9 gram per denier tenacity, and having 3 to 5 turns per inch.

An advantageous feature of the instant invention is that the ring twister may b reconverted to continuous filament production merely by removing the abrasive sleeve or sleeves from the nip roll or the nip roll and the feed roll.

V to secure by Letters Patent is:

In a device for converting a yarn of continuous filaments into a stapilized yarn, the combination with a textile device for processing a running yarn of a single pair of rolls comprising a nip roll and a feed roll for advancing said yarn to the processing device, means for positively driving one of said rolls, a guide for directing the advancing yarn to the rolls and a guide forleading the yarn away from the rolls, a horizontally reciprocating support for the first mentioned guide, and a removable sleeve of an abrasive material on at least said nip roll for severing a portion of the continuous filaments in said yarn to form a stapilized yarn, the construction and arrangement of said parts being such that the advancing yarn is reciprocated laterally as it passes between the nip roll and the feed roll and in a plane which is horizontal to the axes of said rolls, said nip roll and feed roll being the sole means for moving the yarn through the device whereby the yarn moves over the rolls at the same speed as said rolls.

ALVINB. STOREY.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 2,077,078 Taylor et a1 Apr. 13, 1937 2,184,254 Koster Dec. 19, 1939 2,191,417 Woolley Feb. 20, 1940 2,197,856 Finlayson et a1. Apr. 23, 1940 2,221,869 Halin Nov. 19, 1940 2,234,947 Clark Mar. 18 1941 

